*It is extremely unlikely for Toxic Shugguraths to appear in Normal game mode but are fairly frequent in TVHM and UVHM.
*In True Vault Hunter Mode they are renamed Virulent Shuggurath, and Malignant Shuggurath in Ultimate Vault Hunter Mode.
Toxic Shugguraths are larger than regular Shugguraths and distinctive by their dark-green skins and crater-like growths on top of their bodies. Their primary attack is lobbing large corrosive clouds at Vault Hunters, and they occasionally drop corrosive land-mines which either explode on contact or after certain period of time. They only spawn Toxic Rathyds which they can produce at a higher rate than any other type of Shugguraths.